无水氟化氢水冷器延长使用周期及节能工艺研究  

Research on Prolonging Service Cycle and Energy-saving Technology of Anhydrous Hydrogen Fluoride Water Cooler

作　　者：王洪奎 WANG Hong-kui(Qinghai Xikuang Tongxin Chemical Co.,Ltd.,Xining 810000,China)

机构地区：[1]青海西矿同鑫化工有限公司,青海西宁810000

出　　处：《精细化工中间体》2024年第6期32-38,69,共8页Fine Chemical Intermediates

摘　　要：在工业生产萤石-硫酸法制备无水氟化氢(AHF)生产过程中水冷器受多种因素影响,出现水冷器内漏腐蚀问题,造成生产线开停车频繁并增加能源消耗。为延长水冷器使用周期并降低能耗,研究了粗酸质量、水冷进气温度过程控制方法及水冷器列管材质对水冷器使用寿命的影响,探究了冷凝系统由仅使用冷媒介质冷凝变为使用水冷工艺与冷媒冷凝器组合的方式,以及降低冰机负荷的工艺优化。研究结果表明粗氢氟酸中HF含量由90%提升至96%,重组分SO_(4)^(2-)含量由5.4%显著下降到2.5%、H_(2)O含量从2.5%降至1.0%,粗氢氟酸质量提高后重组分含量降低,进入水冷器的SO_(4)^(2-)、H_(2)O量明显减少,腐蚀减轻;水冷器的进气温度维持在38~45℃范围内,水分进入水冷器列管的量大幅降低,腐蚀减轻;水冷器列管使用20#优质碳素钢,耐腐蚀性能增加;水冷器使用周期由1个月延长至1年以上。同时冷凝系统使用循环水和冷冻水组合方式后,冷冻水使用量大幅下降,冰机负荷下降,以AHF9万t/年的产能计,新技术可节约电力费用364万元。延长了水冷器使用周期,水冷工艺的优化降低了能源消耗,提高了经济效益。In industrial production,the water cooler used in the anhydrous hydrogen fluoride(AHF)production process by fluorspar-sulfuric acid method is affected by many factors,which leads to the problem of leakage corrosion in the water cooler,resulting in frequent shutdown of the production line and increased energy consumption.In order to extend the service cycle of the water cooler and reduce energy consumption,the influence of crude acid quality,water cooling intake temperature process control method and water cooling tube material on the service life of the water cooler was studied,and the condensation system was modified from using only cold media to using the combination of water cooling process and refrigerant condenser,and the process optimization study was conducted to reduce the load of the ice machine.The results showed that the content of HF increased from 90%to 96%,the heavy composition content of SO_(4)^(2-)decreased from 5.4%to 2.5%,and the content of H_(2)O decreased from 2.5%to 1.0%.After the quality of hydrofluoric acid increased,the amount of SO_(4)^(2-)and H_(2)O entering the water cooler is obviously reduced,and the corrosion is reduced.The intake temperature of the water cooler is maintained in the range of 38~45℃,the amount of water entering the water cooler tube is greatly reduced,and the corrosion is reduced.The water cooler tube uses 20^(#)high-quality carbon steel,which increases the corrosion resistance.The service cycle of the water cooler is extended from 1 month to more than 1 year.At the same time,after the condensing system uses the combination of circulating water and frozen water,the usage of frozen water is greatly reduced,the load of the ice machine is reduced,and the new technology can save 3.64 million yuan in electricity costs with the annual capacity of 90000 t.

关 键 词：AHF 水冷工艺 能耗 电耗 

分 类 号：TQ81.2[化学工程]